Video disc player with RFI reduction circuit including signal su

Details Video disc player with RFI reduction circuit including signal su Video disc player with RFI reduction circuit including signal su

1980-11-21

1982-11-30

Faber, Alan

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Electrical modification or sensing of storage medium

360 381, 358340, 358167, 455303, H04N 580

Patent

active

043618812

ABSTRACT:
Under certain conditions a video disc player can be responsive to externally applied interference signals to provide a defect in the display of the information recovered from the disc. Apparatus is provided between the pickup circuits and the normal defect compensation apparatus of the player to reduce the influence of the modulated carrier in order to enhance the ability to detect the presence of the extraneous signal and take corrective action. The apparatus includes circuits to subtractively combine the signals from the pickup circuits with an amplitude limited version of the signals from the pickup circuits.

REFERENCES:
patent: 2996576 (1961-08-01), Dolby
patent: 3893168 (1975-07-01), Bechly
patent: 4021852 (1977-05-01), Hurst
patent: 4203134 (1980-05-01), Christopher

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